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WO2005058183A1 - Procede pour determiner la forme d'une zone de dent residuelle - Google Patents

Procede pour determiner la forme d'une zone de dent residuelle Download PDF

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Publication number
WO2005058183A1
WO2005058183A1 PCT/EP2004/013964 EP2004013964W WO2005058183A1 WO 2005058183 A1 WO2005058183 A1 WO 2005058183A1 EP 2004013964 W EP2004013964 W EP 2004013964W WO 2005058183 A1 WO2005058183 A1 WO 2005058183A1
Authority
WO
WIPO (PCT)
Prior art keywords
duplicate
sections
base plate
references
shape
Prior art date
Application number
PCT/EP2004/013964
Other languages
German (de)
English (en)
Inventor
Lothar VÖLKL
Philip Von Schroeter
Original Assignee
Degudent Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Degudent Gmbh filed Critical Degudent Gmbh
Priority to DE502004007366T priority Critical patent/DE502004007366D1/de
Priority to US10/576,510 priority patent/US7922489B2/en
Priority to EP04803633A priority patent/EP1691712B1/fr
Publication of WO2005058183A1 publication Critical patent/WO2005058183A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/34—Making or working of models, e.g. preliminary castings, trial dentures; Dowel pins [4]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A61C9/004—Means or methods for taking digitized impressions
    • A61C9/0046—Data acquisition means or methods
    • A61C9/0053—Optical means or methods, e.g. scanning the teeth by a laser or light beam
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A61C9/004—Means or methods for taking digitized impressions
    • A61C9/0093—Workpiece support
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A61C9/002—Means or methods for correctly replacing a dental model, e.g. dowel pins; Dowel pin positioning means or methods
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H20/00—ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance
    • G16H20/40—ICT specially adapted for therapies or health-improving plans, e.g. for handling prescriptions, for steering therapy or for monitoring patient compliance relating to mechanical, radiation or invasive therapies, e.g. surgery, laser therapy, dialysis or acupuncture

Definitions

  • the invention relates to a method for determining the shape of a duplicate of a residual tooth area to be provided with a dental restoration such as a bridge or framework, the duplicate sections to be provided with and / or determining their design being removed from the duplicate and the shape data to be assigned to the shapes being determined and are stored in a computer by means of which the shape of the restoration is calculated taking into account the spatial assignment of the duplicate sections to one another.
  • a corresponding method can be found in EP 0 731 673 B1 (WO 96/10371). It is provided that in a first method step mutual positions of the duplicate sections in the duplicate are determined by means of a leveling device. In a second step, the duplicate sections removed from the duplicate are scanned by means of a scanning unit in order to determine contour data.
  • the contour data are linked to the position data.
  • a procedure in this regard is complex due to the necessary hardware and therefore harbors a large number of error sources.
  • CONFIRMATION 4GSKOPIE EP-B-0 913 130 discloses a method for producing a dental prosthetic item, in which the shape of a duplicate is first determined, the duplicate is then separated, shapes of extracted duplicate sections are determined, and finally the data of the duplicate and that of the duplicate sections are combined.
  • a procedure in this regard leads to precise measurement results, but in addition to complex software requires complex technical means in order to scan the duplicate on the one hand and the duplicate sections on the other. For this purpose, separate clamping devices are provided, which are to be aligned with a scanner.
  • the present invention is based on the problem of designing a method of the type mentioned at the outset in such a way that the shape of the rest of the tooth area to be provided with or determining the design of the restoration and thus the shape of the restoration itself can be determined with high accuracy. At the same time, measurement errors caused by the apparatus should be minimized.
  • the invention essentially provides that the removed duplicate sections are individually referenced to one another according to a reference stored in the computer and independent of the duplicate, and that these data are linked to the shape data of the duplicate sections in the computer to determine the shape of the dental restoration become.
  • the invention provides that the duplicate sections are or are individually referenced in their spatial allocation to one another after referencing stored in the computer.
  • the duplicate is preferably aligned with a receptacle such as a holder, in particular a base plate which receives the duplicate and which in turn is referenced.
  • a receptacle such as a holder, in particular a base plate which receives the duplicate and which in turn is referenced.
  • Existing referencing is thus used, which ensures a clear geometric relationship between the duplicate sections.
  • the duplicate is attached to a base plate which has references and which is cut and sawn with the duplicate.
  • the individual base plate sections have the necessary references to ensure a geometric or spatial assignment of the duplicate sections to be scanned separately.
  • the duplicate is ground flat on the underside so that it can then be attached to the base plate having a flat surface.
  • the invention is characterized by the method steps:
  • the spatial assignment of the duplicate sections is determined by capturing the data obtained from the references available on the individual model sections with the data of the referencing. This data will then linked to the shape data, that is, the data corresponding to the shapes of the individual duplicate sections, in order to be able to produce the dental restoration, as described, for. B. is disclosed in principle in WO 99/47065 or WO 03/007834.
  • geometric properties of the base plate and / or markings thereof are used as references. Points or lines on the base plate can be used as markings. Limitations such as edges or surfaces of the base plate are preferably to be mentioned as geometric properties.
  • the inner and / or outer longitudinal side wall of the base plate should have a zigzag or corrugated geometry, the corresponding geometry being selected such that an unambiguous assignment of base plate sections to one another is ensured.
  • the height of the elevation or the distance from it can be varied to the required extent. The same applies to a shaft geometry.
  • the respective tips can also be used as reference points, even if they are damaged, for example, provided that the boundary surfaces of the base plate intersecting the tips also have a clear geometric position with respect to one another, as a result of which reference is made.
  • the duplicate In order to ensure that existing duplicates in the edge area of the base plate are not covered by the duplicate to be applied to the base plate, the duplicate should be spaced from the inner and outer edge of the base plate.
  • Referencing can also take place immediately when the impression is taken. So z. B. an impression tray can be designed in such a way that there are references to the impression. Other corresponding measures are also possible. This means that references can also be applied directly to the impression. Further details, advantages and features of the invention result not only from the claims, the features to be extracted from them — individually and / or in combination — but also from the following description of a preferred exemplary embodiment that can be found in the drawing.
  • FIG. 2 is a base plate receiving the duplicate of FIG. 1,
  • FIG. 3 shows a dental model consisting of a duplicate according to FIG. 1 and a base plate according to FIG. 2,
  • Fig. 4 shows a form for the correct position of sections of the dental model according to Fig. 3 and
  • FIG. 5 shows a basic illustration of a holder with a sensor assigned to a section of the dental model according to FIG. 3.
  • the duplicate 10 thus corresponds to a model of a residual tooth area which is to be provided with a dental restoration such as a bridge or framework.
  • a dental restoration such as a bridge or framework.
  • a positive model is produced from the impression or impression, which usually consists of plaster.
  • the duplicate 10 is then ground on the underside (surface 12) in order to be fastened to a flat surface 14 of a prefabricated base plate 16 as if glued.
  • the base plate 16 shows a geometry of an arc shape, that is, one that corresponds to a jaw. If necessary, several sizes of base plates 16 can be made available for the simple adaptation of individual duplicates 10.
  • the base plate 16 has references that enable or form referencing.
  • the references can in particular be predetermined by a special design of the base plate 16.
  • a specially designed geometry of the outside wall 18 or inside wall 20 or their surfaces is provided, which form references.
  • the surfaces 18, 20 are designed in such a way that each section of the base plate 16 is individually referenced, that is to say is characterized with the result that, taking into account the respective reference, a clear geometric or spatial assignment of the corresponding sections of the base plate 16 to one another is ensured.
  • the sections of the duplicate 10 consequently likewise have a clear spatial association with one another.
  • the duplicate 10 fastened on the base plate 16 is shown in FIG. 3.
  • the unit produced in this way can be referred to as a dental model 21.
  • model sections 24 are cut out of the duplicate 10 together with the base plate 16, which correspond to individual teeth, edentulous jaw sections or tooth stumps which are to be provided with the dental restoration or determine their design.
  • the model sections 24 of the dental model 21 accordingly consist of a duplicate section 26 and a section 28 of the base plate 16.
  • the model section 24 to be measured in each case is inserted into a holder 30 in order to detect the geometry by means of a sensor 32 such as a scanner and to supply the corresponding measured values as digital data to a computer in which corresponding data are stored for referencing. So it is only necessary to enter the data of the Model sections 24 are aligned relative to the reference geometry stored in the computer and thus to each other (matching) in order to obtain a data set. In other words, the data corresponding to the referencing is matched with the data obtained from the references of the model sections in order to achieve a spatial assignment of the duplicate sections that corresponds to that in the duplicate and thus to the situation in the patient's mouth.
  • the holder 30 is designed as a pot 34, in which there is a holding compound such as silicone rubber 36 for receiving and fixing the base plate section 28 and thus the model section 24.
  • the pot 34 can then be rotated about its longitudinal axis 38, as symbolized by the arrows 40, 42.
  • the sensor 32 is aligned to the desired extent in order to be able to detect or scan the model section 24 to the required extent.
  • the reference points of the base plate section 28 are recorded in order to be able to unambiguously ascertain a clear geometric assignment of the respective recorded duplicate section 26 to the total duplicate 10 or the position of the duplicate section 26 in the duplicate 10.
  • model section 24 consisting of the base plate section 28 and the duplicate section 26 along the X and Y directions of a right-angled coordinate system to record the geometry.
  • model section 24 there can be a relative movement between the model section 24 and the sensor 32 by desired degrees of freedom.
  • the sensor 32 can also be aligned with the section 24 as required.
  • a mold 22 can be used to align the model sections in the correct position when fitting the manufactured restoration. B. is known from the "model tray" system (Fig. 4).
  • simple measures are used to determine the geometry of the model of a jaw region to be provided with a dental prosthesis such as a bridge.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Veterinary Medicine (AREA)
  • Animal Behavior & Ethology (AREA)
  • Public Health (AREA)
  • Optics & Photonics (AREA)
  • Physics & Mathematics (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Paper (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Dental Prosthetics (AREA)

Abstract

L'invention concerne un procédé de détermination de la forme d'une reproduction d'une zone de dent résiduelle à pourvoir d'une restauration en médecine dentaire. Selon ce procédé, les parties de la reproduction à pourvoir de la restauration sont enlevées de la reproduction et les données de forme à associer à leurs formes sont mémorisées dans un ordinateur, la forme de la restauration étant calculée avec prise en compte de la mise en correspondance spatiale des parties de la reproduction. Pour qu'il soit possible de déterminer avec une plus grande exactitude la forme de la zone de dent résiduelle à pourvoir avec la restauration, et, ainsi, la forme de la restauration elle-même, il est proposé, que les parties de la reproduction soient, à l'avance ou lors de la réalisation du travail, référencées individuellement en ce qui concerne leur correspondance spatiale, cela en fonction d'un référencement mémorisé dans l'ordinateur.
PCT/EP2004/013964 2003-12-09 2004-12-08 Procede pour determiner la forme d'une zone de dent residuelle WO2005058183A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE502004007366T DE502004007366D1 (de) 2003-12-09 2004-12-08 Verfahren zur ermittlung der form eines restzahnbereichs
US10/576,510 US7922489B2 (en) 2003-12-09 2004-12-08 Procedure for determining the form of a residual tooth area
EP04803633A EP1691712B1 (fr) 2003-12-09 2004-12-08 Procede pour determiner la forme d'une zone de dent residuelle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10357699A DE10357699A1 (de) 2003-12-09 2003-12-09 Verfahren zur Ermittlung der Form eines Restzahnbereichs
DE10357699.1 2003-12-09

Publications (1)

Publication Number Publication Date
WO2005058183A1 true WO2005058183A1 (fr) 2005-06-30

Family

ID=34683296

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2004/013964 WO2005058183A1 (fr) 2003-12-09 2004-12-08 Procede pour determiner la forme d'une zone de dent residuelle

Country Status (5)

Country Link
US (1) US7922489B2 (fr)
EP (1) EP1691712B1 (fr)
AT (1) ATE397903T1 (fr)
DE (2) DE10357699A1 (fr)
WO (1) WO2005058183A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1905381A1 (fr) * 2006-09-29 2008-04-02 GC Corporation Support de modèle de dent de butée
EP1927326A1 (fr) 2006-11-28 2008-06-04 DeguDent GmbH Procédé de fabrication d'une restauration dentaire

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004051165B3 (de) * 2004-10-20 2006-06-08 Willytec Gmbh Verfahren und Vorrichtung zur Erzeugung von Datensätzen für die Herstellung von Zahnersatzteilen
US20060275736A1 (en) * 2005-04-22 2006-12-07 Orthoclear Holdings, Inc. Computer aided orthodontic treatment planning
DE102011057029A1 (de) 2011-12-23 2013-06-27 Degudent Gmbh Verfahren zum Herstellen eines zahntechnischen Modells, Tragplatte zur Aufnahme von einem Gebissmodell sowie zahntechnische Einrichtung
DE102016106370A1 (de) * 2016-03-23 2017-09-28 Degudent Gmbh Verfahren zur Herstellung eines eingefärbten Rohlings sowie Rohling

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4767330A (en) * 1985-04-30 1988-08-30 ESPE GmbH Fabrik pharmazeutischer Praparate GmbH Apparatus for fabricating tooth arrangement models
US5338198A (en) * 1993-11-22 1994-08-16 Dacim Laboratory Inc. Dental modeling simulator
WO1996010371A1 (fr) 1994-10-04 1996-04-11 Nobelpharma Ab Procede et dispositif concus pour un produit destine a etre introduit dans le corps humain, et dispositif d'imagerie pour produire un modele du produit
US5605459A (en) * 1995-04-14 1997-02-25 Unisn Incorporated Method of and apparatus for making a dental set-up model
EP0913130A2 (fr) * 1997-10-31 1999-05-06 DCS Forschungs & Entwicklungs AG Méthode et dispositif pour la fabrication d'une prothèse dentaire
WO1999047065A1 (fr) 1998-03-17 1999-09-23 Eidgenössische Technische Hochschule Zürich Nichtmetallische Werkstoffe Couronnes dentaires et/ou bridges dentaires
WO2001064128A1 (fr) * 2000-02-25 2001-09-07 Cynovad, Inc. Modele et procede pour la prise d'empreinte tridimensionnelle d'une zone d'arcade dentaire
WO2003007834A1 (fr) 2001-07-13 2003-01-30 Degudent Gmbh Fabriquer une prothese dentaire a partir d'un modele positif mesure et numerise en trois dimensions

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5452105A (en) * 1992-11-19 1995-09-19 Sharp Kabushiki Kaisha Joint-portion processing device for image data for use in an image processing apparatus
SE501410C2 (sv) * 1993-07-12 1995-02-06 Nobelpharma Ab Förfarande och anordning i samband med framställning av tand, brygga, etc
DE29911424U1 (de) * 1999-07-02 2000-01-13 Dental-Forschung-Schleicher Gmbh, 93339 Riedenburg Modellplatte für dentale Modelle, insbesondere Gipsmodelle
DE20110518U1 (de) * 2001-06-27 2002-05-29 Dietz, Werner, 66740 Saarlouis Multifunktionsabformlöffel für die Zahnmedizin

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4767330A (en) * 1985-04-30 1988-08-30 ESPE GmbH Fabrik pharmazeutischer Praparate GmbH Apparatus for fabricating tooth arrangement models
US5338198A (en) * 1993-11-22 1994-08-16 Dacim Laboratory Inc. Dental modeling simulator
WO1996010371A1 (fr) 1994-10-04 1996-04-11 Nobelpharma Ab Procede et dispositif concus pour un produit destine a etre introduit dans le corps humain, et dispositif d'imagerie pour produire un modele du produit
EP0731673B1 (fr) 1994-10-04 2001-05-30 Nobel Biocare AB (reg. no. 556002-0231) Procede et dispositif concus pour un produit destine a etre introduit dans le corps humain
US5605459A (en) * 1995-04-14 1997-02-25 Unisn Incorporated Method of and apparatus for making a dental set-up model
EP0913130A2 (fr) * 1997-10-31 1999-05-06 DCS Forschungs & Entwicklungs AG Méthode et dispositif pour la fabrication d'une prothèse dentaire
EP0913130B1 (fr) 1997-10-31 2003-03-12 DCS Forschungs & Entwicklungs AG Méthode et dispositif pour la fabrication d'une prothèse dentaire
WO1999047065A1 (fr) 1998-03-17 1999-09-23 Eidgenössische Technische Hochschule Zürich Nichtmetallische Werkstoffe Couronnes dentaires et/ou bridges dentaires
WO2001064128A1 (fr) * 2000-02-25 2001-09-07 Cynovad, Inc. Modele et procede pour la prise d'empreinte tridimensionnelle d'une zone d'arcade dentaire
WO2003007834A1 (fr) 2001-07-13 2003-01-30 Degudent Gmbh Fabriquer une prothese dentaire a partir d'un modele positif mesure et numerise en trois dimensions

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1905381A1 (fr) * 2006-09-29 2008-04-02 GC Corporation Support de modèle de dent de butée
JP2008086467A (ja) * 2006-09-29 2008-04-17 Gc Corp 支台歯模型の保持具
EP1927326A1 (fr) 2006-11-28 2008-06-04 DeguDent GmbH Procédé de fabrication d'une restauration dentaire
US8662890B2 (en) 2006-11-28 2014-03-04 Degudent Gmbh Method for manufacturing a dental restoration

Also Published As

Publication number Publication date
EP1691712A1 (fr) 2006-08-23
EP1691712B1 (fr) 2008-06-11
US20070072151A1 (en) 2007-03-29
ATE397903T1 (de) 2008-07-15
US7922489B2 (en) 2011-04-12
DE10357699A1 (de) 2005-07-28
DE502004007366D1 (de) 2008-07-24

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